Item Type: Watch Movement Material: Plastic, Metal Movement Model: SL28 Calendar: Dual Calendar Number of Hands: 3 Hands Movement Outer Diameter: Approx. 23.7mm / 0.9in Movement Height: Approx. 4.15mm / 0.2in Battery: 1 x 377 (SR626SW) Button Battery (Not Included) Package List 1 x Watch Movement 1. Pay attention to refer to the movement size.2. Please allow slight error due to manual measurement. Thanks for your understanding. 1Dual Calendar: Can be used as a spare part to facilitate you to replace the movement, dual calendar design, considerate and reliable, improve practicality. 2Important Watch Accessory: Indispensable and necessary watch parts for watchmakers and watch repairers, easy to install and replace, bring you convenience. 3Perfect Replacement: Fine workmanship, pay attention to details, wonderful replacement for the old or broken one, help improve the performance of watch. 4Multiple Applicable Place: Light weight and in small size, easy to store and carry, can be easily put into your bag, suitable for home and watch repair shop. 5Plastic And Metal: Watch movement adopts great plastic and metal material, safe and eco friendly, firm and sturdy, no deformation, stable and durable.